JP2012046315A - Workpiece reversing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly reverse a workpiece without providing a means for vertically moving the workpiece and without generating impact during transfer regardless of the difference in thickness of workpieces.SOLUTION: A steel reversing device is configured such that a first pallet 8 and a second pallet 16 each for holding steel w are respectively raised upright by rotating them each other so as to transfer the steel w from the second pallet 16 to the first pallet 8. The first pallet 8 is raised upright while being rotated by a hydraulic cylinder 18. The second pallet 16 is raised upright while being rotated by a hydraulic cylinder 22. The device is provided with a moving mechanism 28 that allows the first pallet 8 to be mounted on a sliding plate 7, sliding along rails, and to be horizontally moved by a hydraulic cylinder 26 in order to adjust a gap between the first pallet 8 and the second pallet 16 rotated at an inclination angle of 85° before being raised upright.

Description

 The present invention relates to a work reversing device for reversing a heavy work such as a steel material.

Conventionally, when cutting both front and back surfaces of a plate-shaped steel material with a machine tool or the like, first, one surface, for example, the surface is first cut, and then the steel material is turned over to reverse the other surface, that is, the back surface. ing.
For example, after processing the surface of the steel material, when the steel material is reversed to process the back surface, the steel material placed in a horizontal state is attracted and held by a magnet chuck, and the steel material is raised to a position of 90 ° by the crane, and the other side I took the method of defeating. However, since the weight of the steel material is large, the work of standing up and tilting is dangerous.

Therefore, as a device for reversing such a steel material, for example, a steel material reversing device described in Patent Documents 1 to 3 has been proposed.
In the work reversing device described in Patent Document 1, a plate-like work such as steel material, which is carried in the horizontal direction on the table of a plate material processing machine, is received inside a pair of reversing frames facing substantially U-shaped. Provide possible inversion supports. Then, the reversing support is rotated approximately 180 ° around the rotation shaft provided on the inner flange portion of the reversing frame and placed on another table. Then, the one reversing frame on the upper side of the reversing support is reversed 180 °, and the reversing support is slightly lowered to leave the work on another table. In this way, the work can be reversed and placed on another table.

Next, in the reversing machine described in Patent Document 2, the plate material conveyed by the conveying belt is adsorbed by the suction tool attached to the reversal support shaft, and the suction tool and the plate material are lifted together with the reversal support shaft by the lifting and lowering drive device. . Then, after the plate material is inverted 180 ° around the reversal support shaft at the raised position and lowered, the plate material is removed from the suction tool.
Further, the reversing device described in Patent Document 3 includes pallets on which slabs can be placed on the carry-in side and the carry-out side, hold the plate materials on these pallets, and rotate the plates 180 degrees to receive each other. It is supposed to pass. Then, a conveyor front and rear moving means for moving the transfer conveyor holding the slab in the transfer direction, and a vertical moving means for transferring the slab to the pallet by moving the transfer conveyor for transferring the slab in the vertical direction are provided. Yes.

Japanese Utility Model Publication No. 5-64130 Japanese Utility Model Publication No. 6-25246 JP-A-10-157838

However, in the work reversing device described in Patent Document 1, a pair of reversing frames for gripping a work when the work has different thicknesses are not provided with an adjustment function in the thickness direction. Therefore, when reversing a thin workpiece, a gap is created between the workpiece in the pair of reversal frames, and when the workpiece rotates by its own weight, an impact due to a load is applied to the reversal frame, There was a risk of scratching the workpiece or damaging the device.
Further, the reversing machine described in Patent Document 2 requires a lifting device that lifts and lowers the plate material, and when the weight of the plate material increases, it becomes difficult to adsorb and lift or reverse the plate material. There was a bug.
In addition, the reversing device described in Patent Document 3 has a drawback that the mechanism of the reversing device is complicated because the moving means for moving up and down the conveyor is necessary for delivery of the plate material.

 The present invention has been made in view of the above-described problems, and can be reversed without providing a means for moving the workpiece up and down without causing an impact due to a gap regardless of the thickness of the workpiece. It is an object to provide a work reversing device.

In the work reversing device according to the present invention, the work is transferred from the second pallet to the first pallet and reversed by rotating the first pallet holding the work and the second pallet to stand up. A work reversing device, which is a first pallet for adjusting a rotation axis for rotating the first pallet and the second pallet, respectively, and a gap between the first pallet and the second pallet according to the thickness of the work Alternatively, a moving mechanism for moving the second pallet is provided.
According to the work reversing device of the present invention, with the work held on the second pallet, the first pallet and the second pallet are rotated in the standing direction around the rotation axis, and before the work is delivered. The first pallet or the second pallet is moved so that the gap between the work placed on the second pallet and the first pallet becomes small by the moving mechanism, and then the first pallet and the second pallet The workpiece is transferred from the second pallet to the first pallet by rotating at least one of the two. At this time, since the work held on the second pallet has a minimum gap with the first pallet, the impact caused by the movement of the work when the work is transferred from the second pallet to the first pallet. Does not occur. Then, when the first pallet to which the workpiece has been delivered is tilted in the opposite direction, the workpiece is reversed.

The first pallet is provided with a detection sensor for detecting the distance from the work held on the second pallet, and the work of the second pallet and the first pallet when the work is delivered by the detection sensor. A gap with the pallet may be set.
In the standing state, the detection sensor detects the distance of the gap between the workpiece on the first pallet and the second pallet, and detects the distance so that this gap is a preset distance that does not cause an impact when the workpiece is delivered. While detecting the distance of the gap with the sensor, at least one of the first pallet and the second pallet is rotated in a direction approaching each other.

The first pallet and the second pallet each include a support portion that supports the surface of the workpiece and a receiving portion that supports the end surface of the workpiece. The receiving parts of the pallets are preferably fitted alternately.
With the first pallet and the second pallet held in an upright state with the work sandwiched therebetween, the work supported by the receiving portion of the second pallet rotates the first pallet to rotate the first pallet. Is passed on.

In the standing state of the first pallet and the second pallet, it is preferable that the receiving part of the first pallet is higher than the receiving part of the second pallet.
As a result, when the first pallet and the second pallet rotate so as to face each other and are held in an upright state with the workpiece sandwiched therebetween, the workpiece is transferred from the receiving portion of the second pallet to the receiving portion of the first pallet. It will be in the transferred state, and it will be easy to reverse by transferring the workpiece.

Further, the rotational speed from the predetermined inclination angle to the standing state is set smaller than the driving means for rotating the second pallet and the rotational speed for rotating the second pallet in the standing direction to the predetermined inclination angle. And a control means.
The rotation speed for rotating the second pallet holding the workpiece in the standing direction to a predetermined tilt angle is set to a relatively high speed, so that the workpiece is quickly rotated in the standing direction, and then the standing state from the predetermined tilt angle. By setting the rotational speed of the second pallet up to a relatively low speed, the impact can be reduced when the workpiece is transferred from the second pallet to the first pallet.

 According to the work reversing device of the present invention, the first pallet and the second pallet are rotated in the upright direction while the work is held on the second pallet, and the moving mechanism is used by the moving mechanism before the work is delivered. By moving the one pallet or the second pallet so that they are close to each other and positioning them in the smallest gap, even if the workpiece thickness is different, the gap between the first and second pallets Since it can be minimized, there is no impact due to the movement of the workpiece during delivery of the workpiece, and damage to the workpiece and the first and second pallets can be prevented. The workpiece can be smoothly reversed regardless of its thickness and weight.

It is a principal part side view of the steel material inversion apparatus by embodiment of this invention. It is a principal part top view which shows the 1st pallet and 2nd pallet in an open state. It is the sectional view on the AA line of the steel material inversion apparatus shown in FIG. It is the BB line center sectional drawing of the steel material inversion apparatus shown in FIG. (A), (b) is a fragmentary sectional view which shows the steel material delivery state by a 1st and 2nd pallet. (A), (b), (c) is the schematic which shows the steel material inversion process in the steel material inversion apparatus by embodiment. (D), (e), (f) is the schematic which shows a steel material inversion process.

Hereinafter, a steel material reversing device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.
The steel material reversing apparatus 1 according to the embodiment of the present invention shown in FIGS. 1 and 2 processes, for example, a surface w1 which is one surface of a plate-shaped steel material w as a workpiece, and then the reverse surface w2 which is the other surface reversed. It is a steel material reversing device for processing.
In the steel material reversing device 1, a space k is provided in the upper center portion of the substrate 2, and steel material reversing portions 3 and 4 are provided on both sides thereof. In the steel material reversing portion 3 on the carry-out side (left side in FIG. 1), as shown in FIG. A sliding plate 7 is disposed so as to be able to advance and retract toward the steel reversing portion 4 on the carry-in side (right side in FIG. 1) via the rail receiving portions 6 and 6 to be joined.

In the steel material reversing part 3 on the carry-out side shown in FIGS. 1 and 3, a first pallet 8 on which the steel material w is placed is supported on the sliding plate 7 so as to be rotatable around the rotation shaft 9. A pair of rotary shafts 9 are disposed on both sides in the vicinity of the end on the space k side, and a shaft body 13 horizontally connects a shaft portion 11 extending downward from the first pallet 8 and a bearing portion 12 extending upward from the sliding plate 7. It is inserted in the direction. In addition, a pair of support columns 14 are attached in the vicinity of the end of the sliding plate 7 on the side opposite to the rotating shaft 9.
Therefore, when the first pallet 8 is rotated about 90 ° clockwise in the space k around the rotation shaft 9 from the horizontal state supported by the support 14, the first pallet 8 is separated from the support 14. When the pallet is in the upright state indicated by a two-dot chain line at 1 and is rotated counterclockwise by approximately 90 ° counterclockwise from the erected state, the first pallet 8 is in a horizontal state in which it is seated on the support column 14. The first pallet 8 can rotate forward and backward around a rotation shaft 9 disposed at an eccentric position.
Further, as shown in FIG. 2, the first pallet 8 has a substantially L-shaped cross section including a substantially rectangular support surface 8a on which the steel material w is placed in a horizontal state and a receiving portion 8b. The receiving portion 8b is divided into a plurality (five in the figure) with a predetermined gap d1.

Further, in the steel reversing device 1 shown in FIG. 1, the steel reversing portion 4 on the carry-in side is provided with the same members as the steel reversing portion 3 on the carry-out side, which is substantially line symmetrical, Explanation will be made using the same reference numerals.
That is, the second pallet 16 for placing the steel material w is supported on the substrate 2 of the steel material reversing unit 4 on the carry-in side so as to be rotatable around the rotation shaft 9. A pair of rotary shafts 9 are disposed on both sides in the vicinity of the end on the space k side, and a shaft 13 extends horizontally between a shaft portion 11 extending downward from the second pallet 16 and a bearing portion 12 extending upward from the substrate 2. It is inserted.
In addition, for example, a pair of support columns 14 are attached in the vicinity of the end portion of the substrate 2 opposite to the rotating shaft 9.
Therefore, when the second pallet 16 is rotated approximately 90 ° counterclockwise around the rotation axis 9 in the space k from the horizontal state supported by the support 14, the second pallet 16 is separated from the support 14. When the pallet is in the upright state indicated by a two-dot chain line in FIG.

Further, as shown in FIG. 2, the second pallet 16 has a substantially L-shaped cross section including a substantially rectangular support plate 16a on which the steel material w is placed in a horizontal state and a receiving portion 16b. The receiving portion 16b is divided into a plurality (six in the figure) with a predetermined gap d2.
Moreover, when the first pallet 8 and the second pallet 16 are both upright in the space k, the receiving portion 8b of the first pallet 8 is in the gap d2 of the receiving portion 16b of the second pallet 16. The receiving portions 16b of the second pallet 16 are inserted into the gaps d1 of the receiving portions 8b of the first pallet 8, and are held alternately. In addition, the first pallet 8 and the second pallet 16 form a substantially U shape.

  In addition, in the state where the first and second pallets 8 and 16 are both held upright so as to form a substantially U shape, the receiving portion 16b of the second pallet 16 is the first pallet 16 as shown in FIG. The pallet 8 is formed so as to be located slightly below the receiving portion 8b. Therefore, when the first and second pallets 8 and 16 are both held upright, the steel material w is transferred from the second pallet 16 to the first pallet 8 and held.

Next, the drive mechanism of the steel material reversing device 1 will be described with reference to FIG.
In the steel material reversing part 3 on the carry-out side, for example, a first hydraulic cylinder 18 is swung around the support shaft 19 as a rotating device for the first pallet 8 at the rear end of the sliding plate 7 opposite to the space k. It is provided to be movable. The tip of the rod 20 provided so as to be able to protrude and retract from the cylindrical portion on the tip side of the first hydraulic cylinder 18 is supported in the vicinity of the attachment portion of the rotary shaft 9 in the first pallet 8.
By driving the first hydraulic cylinder 18 and extending the rod 20, the pressed first pallet 8 rotates clockwise around the rotation shaft 9 from the horizontal state and is held in the standing state. By contracting 20, the first pallet 8 is rotated counterclockwise around the rotating shaft 9 from the standing state and is seated on the support column 14.
Further, in the steel material reversing portion 4 on the carry-in side, for example, a second hydraulic cylinder 22 is centered on the support shaft 23 as a turning device for raising the second pallet 16 at the rear end portion on the carry-in side of the substrate 2. Is provided to be swingable. The tip of the rod 24 provided so as to be able to project and retract on the tip side of the second hydraulic cylinder 22 is supported in the vicinity of the attachment portion of the rotary shaft 9 in the second pallet 16.

In FIG. 4, a sliding hydraulic cylinder 26 disposed in the horizontal direction is attached as a driving means on the substrate 2 in the steel reversing unit 3 on the carry-in side. In the hydraulic cylinder 26, for example, the rod 27 extends to the opposite side to the space k (or may be the space k side) and is connected to the lower surface of the sliding plate 7.
When the rod 27 is turned on, the rod 27 contracts into the hydraulic cylinder 26 and the sliding plate 7 is moved horizontally by an appropriate distance toward the space k. When the rod 27 is turned off, the sliding plate 7 is separated from the space k. It moves horizontally in the direction and returns to the reference position. In addition, the sliding plate 7 can be stopped at an arbitrary position according to the thickness of the steel material w.
The sliding plate 7, the guide rail 5, the rail receiving portion 6, and the hydraulic cylinder 26 constitute a moving mechanism 28 that reciprocates the first pallet 8 in the horizontal direction by a minute distance.

As shown in FIGS. 4 and 5, a detection sensor 29 is provided in the vicinity of the receiving portion 8 b on the support surface 8 a that receives the steel material w of the first pallet 8, and the detection sensor 29 is electrically connected to the control means 30. Connected. The control means 30 is also connected to the first and second hydraulic cylinders 18, 22 and the hydraulic cylinder 26.
The detection sensor 29 measures the distance from the steel material w held on the second pallet 16 that stands up to a predetermined inclination angle, and moves the sliding plate 7 until a predetermined minute distance is reached.
Then, the second pallet 16 is rotated toward the standing state by the hydraulic cylinder 22, and is rotated at a relatively high speed until the second pallet 16 is held at a predetermined inclination angle of about 85 ° from the substrate 2, for example. It is controlled by the control means 30 so as to rotate at a relatively low speed up to 90 °. When the second pallet 16 reaches an inclination angle of about 85 °, the steel sensor w on the receiving portion 16b approaches the first pallet 8 and is detected by the detection sensor 29.

The detection sensor 29 includes, for example, a light emitting unit and a light receiving unit, measures the distance between the steel material w held on the second pallet 16, and determines the distance between the steel material w and the support surface 8 a of the first pallet 8. The sliding plate 7 is moved in the approaching direction by the moving mechanism 28 and stopped until the minimum gap is reached.
This prevents the steel material w from colliding with the first pallet 8 when the steel material w raised by the detection sensor 29 and the hydraulic cylinder 26 is delivered, even if the steel material w has a different thickness. Without this, the steel material w can be delivered by the first and second pallets 8 and 16.

  In the steel reversing unit 3 on the carry-in side shown in FIG. 4, a pair of first hydraulic cylinders 18 are arranged, for example, in the direction perpendicular to the paper surface on the lower surface of the first pallet 8, and the hydraulic cylinder 26 is arranged in the middle. It may be provided. Similarly, a pair of second hydraulic cylinders 22 may be disposed in the direction perpendicular to the paper surface on the lower surface of the second pallet 16, for example.

The steel reversing device 1 according to the present embodiment has the above-described configuration, and the operation thereof will now be described with reference to the schematic diagrams of FIGS. 6 and 7.
As shown in FIGS. 1 and 2, in the steel reversing device 1, the first and second pallets 8 and 16 are held horizontally on the substrate 2. And after processing the surface which is one side of steel materials w with a processing device, the processed surface is adsorbed, for example with a magnet chuck, and moved with a crane, and as shown in FIG. It is placed on the support surface 16 a of the second pallet 16. The steel material w is placed on the support surface 16a of the second pallet 16, and its end surface is brought into contact with the receiving portion 16b.

In this state, the steel material reversing apparatus 1 is automatically operated.
First, as shown in FIG. 6B, the first hydraulic cylinder 18 is activated and the rod 20 is extended, so that the horizontal first pallet 8 is rotated 90 ° clockwise about the rotation axis 9. Rotate and keep standing in space k. Next, by starting the second hydraulic cylinder 22 and extending the rod 24, the second pallet 16 is rotated counterclockwise about the rotation shaft 9 as shown in FIG. It stands up to a predetermined inclination angle, for example, an inclination angle of about 85 °.

When the lower end surface of the steel material w reaches the position of the inclination angle of about 85 ° by the relatively high speed rotation for raising the second pallet 16, the first pallet 8 A state in which there is a gap slightly inclined in the vicinity of the support portion 8a is obtained. When the steel material w reaches an inclination angle of about 85 °, the lower end portion of the steel material w reaches a position facing the detection sensor 29 provided on the support surface 8a of the first pallet 8 as shown in FIG. .
At this position, the second hydraulic cylinder 22 is slightly stopped by the control means 30. Alternatively, the subsequent rotation of the second pallet 16 may be controlled at a relatively low speed without stopping. When the second pallet 16 reaches an inclination angle of about 85 °, the detection sensor 29 detects the distance from the steel material w, and the detection signal of the detection sensor 29 is input to the control means 30.

Here, if the thickness of the steel material w supported by this is equal to the length of the receiving portion 16b of the second pallet 16, the gap between the first pallet 8 and the second pallet 16 is adjusted. do not have to. However, when the thickness of the steel material w is relatively small, it is necessary to adjust the distance between the first pallet 8 and the second pallet 16 for smooth delivery of the steel material w.
In this case, when the detection signal of the detection sensor 29 is input to the control means 30, the hydraulic cylinder 26 is activated by the output signal from the control means 30, and the rod 27 contracts to slide the first pallet 8. The moving plate 7 moves in a direction approaching the second pallet 16.
Then, the distance between the lower end of the steel material w and the first pallet 8 is continuously measured by the detection sensor 29, and the hydraulic cylinder 26 is turned off when the distance corresponding to a small gap set in advance is reached.

Then, the hydraulic cylinder 22 is driven again at a lower speed than the previous time (see FIG. 6D), and the second pallet 16 is rotated and stopped from the 85 ° to 90 ° standing state. As a result, as shown in FIG. 7A, the support surfaces 8a and 16a of the first pallet 8 and the second pallet 16 are in parallel with each other, and the receiving portion 16b of the second pallet 16 is in the first state. The pallet 8 is fitted in the gap d1 of the receiving portion 8b.
In this state, there is only a slight gap between the steel material w and the support portion 8 a of the first pallet 8. Moreover, as shown in FIGS. 5 (b) and 7 (a), in the standing state, the receiving portion 8 b of the first pallet 8 is located above the receiving portion 16 b of the second pallet 16. Is transferred from the second pallet 16 to the receiving portion 8 b of the first pallet 8 and supported by the first pallet 8.

Next, the rod 20 is contracted by driving the hydraulic cylinder 18 of the first pallet 8, whereby the first pallet 8 is moved from the standing state to the center of the rotary shaft 9 as shown in FIG. ° Turn counterclockwise to level. In this state, the steel material w is held on the first pallet 8 and is reversed.
In FIG. 7B, the sliding plate 7 and the first pallet 8 are moved backward in the horizontal direction so as to be separated from the space k by the hydraulic cylinder 26. Further, the second pallet 16 is rotated 90 ° clockwise around the central axis 9 by the hydraulic cylinder 22 to return to the horizontal state.
Thereafter, the steel material w placed on the first pallet 8 may be transported to the next process to process the back surface.

As described above, according to the steel material reversing device 1 according to the present embodiment, when the steel material w is transferred from the second pallet 16 to the first pallet 8 and reversed in order to reverse the steel material w, the moving mechanism 28 moves the steel material w. Regardless of the thickness, the gap between the first and second pallets 8 and 16 is adjusted so that the gap is eliminated or minimized so that the steel material w is transferred from the second pallet 16 to the first pallet 8. The impact when moving to can be eliminated.
Moreover, since the automatic reversing work of the steel material w can be performed, the work efficiency and labor saving can be achieved.

In the above-described embodiment, the moving mechanism 28 is provided on the first pallet 8 and the horizontal movement is performed to adjust the gap between the first and second pallets 8 and 16 sandwiching the steel material w. However, instead of this, a moving mechanism 28 may be provided on the second pallet 16 to adjust the gap between the first and second pallets 8 and 16.
Further, as the moving mechanism 28, an electric cylinder may be provided instead of the hydraulic cylinder 26, or an electric motor or the like may be adopted. In addition, instead of the hydraulic cylinders 18 and 22, an electric cylinder, an electric motor, or the like may be employed as the rotation device.

Further, when the gap between the first and second pallets 8 and 16 is adjusted, in the above-described embodiment, the gap between the first pallet 8 and the second pallet 16 is adjusted. When w is thicker than the receiving portion 8b, the gap may be adjusted by moving the sliding plate 7 in the direction away from the second pallet 16 by the moving mechanism 28.
Moreover, in the above-mentioned embodiment, although the receiving part 8b of the 1st pallet 8 was installed in the position higher than the receiving part 16b of the 2nd pallet 16 in a standing state, the receiving parts 8b and 16b are the same height. Alternatively, the receiving portion 16b may be set at a lower position. In these cases, the steel material w is received from the receiving portion 16b of the second pallet 16 by the receiving portion 8b by rotating the first pallet 8 in the horizontal direction from the standing state.
In addition, although the above-mentioned embodiment demonstrated the steel material reversing apparatus 1 for reversing the steel material 1, this invention is not limited to such a structure, The work containing various board | plate materials other than steel materials, etc. is reversed. The present invention may be applied to a workpiece reversing device for reversing various workpieces.

DESCRIPTION OF SYMBOLS 1 Steel material inversion apparatus 2 Board | substrate 3 Steel material inversion part of carrying-in side 4 Steel material inversion part of carrying-out side 5 Rail 7 Sliding plate 8 First pallet 8a, 16a Support part 8b, 16b Receiving part 9 Rotating shaft 16 Second pallet 18 First hydraulic cylinder 22 Second hydraulic cylinder 26 Hydraulic cylinder 28 Moving mechanism 29 Detection sensor 30 Control means

Claims (5)

A work reversing device in which the first pallet holding the work and the second pallet are rotated and raised to each other so that the work is transferred from the second pallet to the first pallet and reversed.
Rotating shafts for rotating the first pallet and the second pallet,
A work reversal comprising: a moving mechanism for moving the first pallet or the second pallet to adjust a gap between the first pallet and the second pallet according to the thickness of the work. apparatus.   The first pallet is provided with a detection sensor that detects a distance from the work held on the second pallet, and the work of the first pallet and the second pallet when the work is delivered by the detection sensor. The work reversing device according to claim 1, wherein a gap with the pallet is set.  Each of the first pallet and the second pallet includes a support portion that supports the surface of the workpiece and a receiving portion that supports the end surface of the workpiece. The workpiece reversing device according to claim 1, wherein the receiving portions of the pallets are alternately fitted.  4. The workpiece according to claim 3, wherein the first pallet and the second pallet are in a standing state, and the receiving portion of the first pallet is at a higher position than the receiving portion of the second pallet. Inversion device. Drive means for rotating and raising the second pallet;
2. Control means for setting the rotational speed from the predetermined inclination angle to the standing state smaller than the rotational speed at which the second pallet is rotated in the standing direction to the predetermined inclination angle. The work reversing device according to any one of 1 to 4.

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